Refusal to discharge Victor from the navy (3)
I believe the answer is:
nay
'refusal' is the definition.
(archaic word for 'no')
'victor from the navy' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'from' indicates named letters should be taken away.
'navy' with 'v' taken out is 'NAY'.
'to discharge' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for nay that I've seen before include "Archaic negative" , "even" , "No - a negative vote" , "No (dialect); or rather" , "Negative answer" .)